Answer:
on there boat there will two main forces act 1,upthrust which comes from water and air and other side on the plane air and gravity.
Explanation:
Power=work/time
So,
Power =450/50=9watts
Answer:
1660 V
Explanation:
Resistance should be determined and then voltage drop across the power line can be determined.
R = ρ L /A
Here ρ = Resistivity of aluminum = 
L = length = 32 km = 32,000 m
Area of cross section = A = π r² = π (0.027/2)² = 0.00057255 m²
Resistance = R =
( (32,000)/(0.00057255) = 1.5090 Ohms.
Voltage drop = V = I R = (1100)(1.5090) = 1659.9 V.
(If resistivity value is different, then the resistance will be different and hence final answer for voltage will also vary ).
Answer:
0.90291 m/s
0.45055 m/s
Explanation:
= Mass of canon = 2090 kg
= Mass of ball = 16.7 kg
= Velocity of canon
= Velocity of ball = 113 m/s
In this system the momentum is conserved
The velocity of the cannon is 0.90291 m/s
Applying energy conservation
The ball would travel 113.45055-113 = 0.45055 m/s faster
The magnitude of the second charge given that the first is –6×10¯⁶ C and is located 0.05 m away is +3.0×10¯⁶ C
<h3>Coulomb's law equation </h3>
F = Kq₁q₂ / r²
Where
- F is the force of attraction
- K is the electrical constant
- q₁ and q₂ are two point charges
- r is the distance apart
<h3>How to determine the second charge </h3>
- Charge 1 (q₁) = –6×10¯⁶ C
- Electric constant (K) = 9×10⁹ Nm²/C²
- Distance apart (r) = 0.05 m
- Force (F) = 65 N
F = Kq₁q₂ / r²
Cross multiply
Fr² = Kq₁q₂
Divide both side by Kq₁
q₂ = Fr² / Kq₁
q₂ = (65 × 0.05²) / (9×10⁹ × 6×10¯⁶)
q₂ = +3.0×10¯⁶ C (since the force is attractive)
Learn more about Coulomb's law:
brainly.com/question/506926
